IF I WERE TRAPPED ON A DESERT ISLAND WITH ONLY THREE TV SERIES
I would go berserk (and also try to use the electricity I presumably have to watch said shows for a more practical purpose, but here goes...
- •Buffy the Vampire SlayerBecause it's my favorite and I would never get bored of it.
- •M*A*S*HBecause 11 seasons of the best witty writing ever.
- •Whose Line Is It AnywayBecause it never fails to make me laugh, and despite its fleeting, one-time-only nature, it has quite the rewatch value. Note I'm not differentiating between the UK, US, and US reboot versions.